Cari keliling & luasnya+sama caranya...

keliling = 16 + 20 +  √(12² + 5²) 
= 36 + √(144 + 25)
= 36 + √169
= 36 + 13
= 49 cm

luas = [1/2 [(16 + 5) × 12] ] - [1/2 (5 × 12)]
= [1/2 (21 × 12)] - [1/2 × 60]
= [1/2 × 252] - 30
= 126 - 30 
= 96 cm² [C]

kira2 sprti itu trims :)